Tire



H. J. DOUGHTY.

Feb. 1,446,165.

TIRE.

FILED AUG-12.1918.

Patented Feb. 20, 1923.

HENRY J. DOUGHTY, F PROVIDENCE,

COMPANY, OF PORTLAND,

RHODE ISLAND, ASSIGNOR MAINE, A CORPORATION OF TO DOUGHTY TIRE MAINE.

TIRE.

Original application filed December 17, 1915, Serial Ito-67,465. Divided and this application filed August 12, 1918.

To all whom it may concern:

Be it known that I, HENRY J. Douerrrr, a citizen of the United States, and a resident 1 of Providence, 5 and State of Rhode Island, have invented an Improvement in Tires, of which the following description, in Connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts. I

' This invention relates to tires of the socalled cord type wherein the body of the "tire'is formed of comparatively large cords instead of woven fabric, these cords be1n a unwoven or at most lightly held together by occasional threads. This application is a division of my .application Serial N o. 67 ,465, filed Dec. 17, 1915.

My invention will best be understood by reference to the following description. taken in connection with the accompanying drawing wherein: 1 Figure 1 is a View in plan illustrating the material or fabric from which my tire is made; I

.. Fig. 2 is a view illustrating how the tire body is built up from such material; and

Fig. 3 is a fragmentary perspective ,view

of the tire body with the layers separated to disclose the construction.

In accordance with my invention I take two strands or Wires 5 which are of indefinite length as contrasted with endless rings and arranging these at a suitable distance apart,

corresponding to the transverse measurement of the tire from bead to head across the tread, I wrap about them in zigzag relation a strip 7 comprising a series of parallel cords 9 side by side, This strip may conveniently be formed of such cords embedded in and secured together by rubber. The width of the strip 7 and the pitch of the windings are preferably so chosen that the edges of adjacent turns touch, as indicated in Fig.71,

and a material is thus provided including two thicknesses of stantially without break and with thecords of adjacent layers crossing each other. This material may be prepared of indefinite 51) length, conveniently by the process and mechanism disclosed in my" application Serial No. 67,465, filed Dec. 17, 1915.

To'cfonstruct'a tire in accordance with my invention I take a suitable length of this main the county of Providence.

' built up as described, the tire may portions are builtup of turns or convolutions cords, each thickness sub- Serial No. 249,437.

terial greater than the circumference of the desired tire and coil it' around a suitable former, the strands 5 coming at the beads of the proposed tire, as indicated in Fig. 3, and

the middle portion of the strip being curved outwardlybetween the beads to tire form. The strip is Wound around in a number of convolutions, each lying wholly exterior to the preceding, as indicated in Fig. 2 and I have there shown somewhat more than two such convolutions, this being for the purpose of graphic illustration. It will be understood that preferably the winding is continued to provide a substantially uniform thickness for the tire body.

After a body or suitable thicknessh as been be treaded and cured in the usual manner. A tire constructed as described may have any desired number of thicknessesof" cords and it will be noted by referring to Fig. 3 that'the direction of'the cords in adjacent layers, whether of the the same turn of strip orof adjacent turns, is crossed. and there is no danger of the cords of one layer working in' and separating the cords of another layer. The head several turns of the edge strands 5 and the body-forming strands 9 extend continuously through the various of the body-forming strip. Joints in the body of the tire are thus eliminated and the cords will not become loose and separate,

In accordance with my invention I may,

while winding up the tire in the manner suggested by Fig. 2, lead in between the layers reinforcing strips 11, shown in Fig. 3. Such strips, whether of rubber orof fabricreinforced rubber, will distribute the pressure of-the cords and minimize relative wear thereof between adjacent layers of thetire.

The addition of such strips is made possible by the construction of the tire from a continuous strip Wound upon self as shown in Fig. 2, it being merely necessary to lead the strips in and COll them around the former while the cord strip shown in Fig. 1 is being so coiled.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 2* l 1. A tire havinga body portion including lateral strands and parallel rubber-covered cords Wound in. zigzag relation. about said prepared as shown in Fig, 1

strands to providea band, said band being coiled on itself circulnferentially in a nuin bvr of turns.

2. A tire having a body portion including lateral strands and parallel rubber-covered cords Wound in zigzag relation about said strands to provide band, said band being coiled on itself cii'cuinferentially in a nuun ber of turns, and reinforcing strips laid between the turns.

A tire having a body portion including lateral strands and parallel rubber-covered cords Wound 'in zigzag relation about said strands to provide a band, said band being coiled on itself circuinferentially in a nuniber of turns, and a reinforcing strip coiled with the band to provide pressure-distributing turns between the turns of the latter.

4. A. tire having a body comprising a set of parallel cords crossing the tire obliquely from bead to bead and continuing unbroken to provide a number of double circumferential plies, each ply lying Wholly exterior to the preceding.

5. A tire having bead portions comprising strands Wound in a plurality of circumferential turns and continuous body-forming cords extending obliquely back and forth between corresponding turns in succession.

In testimony whereof, I have signed my name to this specification.

HENRYQ. DOUGHTY 

